SDK_VERSION: Use Zephyr SDK 0.17.4

This commit updates ZEPHYR_SDK to point to the Zephyr SDK 0.17.4 release.

Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
(cherry picked from commit 59a5909abbffefa2e65a7374111de5a604a7fe70)
1 file changed